UDPClient does not receive reply from UDPServer

Projects Programming
1

Hi everyone,
I am working on using UDPSendReceiveString example to receive message from the UDPClient and send reply. I am using Ethernet shield to provide UDPServer and wifi2866-12E working as UDPClient. The UDPclient send Hello message to the server but it does not receive any response! the code for UDPClient is :
/*

  • 31 mar 2015
  • This sketch sends UDP packets to an UDP server.
  • On a Mac the NC command can be used to receive the messages. ( sudo nc -lu 888 ).
  • Configuration : Enter the ssid and password of your Wifi AP. Enter the IP number and Udp number of your receiving UDP server.

*/

#include <ESP8266WiFi.h>
#include <WiFiUDP.h>

const char* ssid     = "****";
const char* password = "******";
char packetBuffer[20];
// A UDP instance to let us send and receive packets over UDP
WiFiUDP Udp;


void setup() {
  Serial.begin(115200);
  delay(10);

  // We start by connecting to a WiFi network

  Serial.println();
  Serial.println();
  Serial.print("Connecting to ");
  Serial.println(ssid);
  
  WiFi.begin(ssid, password);
  
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }

  Serial.println("");
  Serial.println("WiFi connected");  
  Serial.println("IP address: ");
  Serial.println(WiFi.localIP());
  
  Udp.beginPacket("192.168.1.59", 8888);
  Udp.write("hello");
    Udp.endPacket();
}

void loop() {

     int packetSize = Udp.parsePacket();
  if (packetSize) {
    int len = Udp.read(packetBuffer, 20);
    if (len > 0) packetBuffer[len] = 0;
    Serial.println(packetBuffer);

  }
      
}

I am not sure what I missed.any ideas?

2

Pleas don't double post. I am responding to your post in Networking.